/* ===== CSS VARIABLES (Matching menulist.work) ===== */
:root {
  /* Colors */
  --primary-color: #d4a574;
  --primary-hover: #be9160;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --bg-gradient: linear-gradient(135deg, #f8e8d8 0%, #f0d5c4 100%);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);

  /* Spacing - Mobile-first */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 20px;
  --spacing-xl: 24px;

  /* Touch Targets */
  --touch-min: 60px;
  --touch-tablet: 52px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(212, 165, 116, 0.15);
  --shadow-lg: 0 8px 32px rgba(212, 165, 116, 0.2);
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;

  /* Safe area insets for notched devices */
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

/* ===== HEADER ===== */
.app-header {
  background: white;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
}

.header-content {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-section i {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: white;
  flex-shrink: 0;
}

.logo-section h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.2;
}

.subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0;
}

/* ===== POWERED BY BADGE (Header) ===== */
.powered-by-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  background: white;
  border: 1px solid rgba(212, 165, 116, 0.3);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.powered-by-badge:hover {
  border-color: var(--primary-color);
  box-shadow: 0 2px 12px rgba(212, 165, 116, 0.3);
  transform: translateY(-1px);
}

.powered-by-badge:active {
  transform: scale(0.95);
}

.powered-by-badge img {
  height: 32px;
  width: auto;
  display: block;
}

/* ===== CONTAINER ===== */
.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm) calc(80px + var(--spacing-xl) + env(safe-area-inset-bottom));
  /* Extra padding for bottom navigation */
}

/* ===== CARD COMPONENT ===== */
.card {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

/* ===== LEGAL NOTICE ===== */
.legal-notice {
  background: linear-gradient(135deg, #fff5e6 0%, #ffe8cc 100%);
  border: 2px solid var(--warning);
}

.notice-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.notice-header i {
  font-size: 24px;
  color: var(--warning);
  flex-shrink: 0;
}

.notice-header h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.rules-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.rules-list li {
  padding: var(--spacing-xs) 0;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.rules-list li.prohibited {
  color: var(--danger);
  font-weight: 600;
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: rgba(239, 68, 68, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-lg) 0;
}

.section-subtitle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-md) 0;
}

/* ===== FORM INPUTS ===== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9375rem;
}

.input-wrapper {
  position: relative;
}

.form-input {
  width: 100%;
  min-height: 60px;
  padding: 0 48px 0 var(--spacing-md);
  border: 2px solid rgba(0, 0, 0, 0.12);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  background: white;
  transition: all 0.2s ease;
  font-family: inherit;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(212, 165, 116, 0.15);
}

.currency-symbol {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-secondary);
  pointer-events: none;
}

/* ===== PAYMENT SECTION ===== */
.payment-section {
  margin-top: var(--spacing-xl);
}

/* ===== PRESET BUTTONS ===== */
.preset-buttons {
  margin-bottom: var(--spacing-lg);
}

.preset-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 0 0 var(--spacing-sm) 0;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: var(--spacing-sm);
}

.btn-preset {
  min-height: 48px;
  padding: 10px 12px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  font-family: inherit;
}

.btn-preset:active {
  transform: scale(0.95);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* ===== CALCULATE BUTTON ===== */
.btn-calculate {
  width: 100%;
  min-height: var(--touch-min);
  padding: var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: all 0.2s ease;
  box-shadow: 0 4px 16px rgba(212, 165, 116, 0.3);
  margin-top: var(--spacing-lg);
  font-family: inherit;
}

.btn-calculate:active {
  transform: translateY(2px);
  box-shadow: 0 2px 8px rgba(212, 165, 116, 0.2);
}

/* ===== RESULTS SECTION ===== */
.results-section {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 2px dashed rgba(212, 165, 116, 0.3);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.results-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-md) 0;
}

.breakdown-card {
  background: rgba(212, 165, 116, 0.05);
  border: 1px solid rgba(212, 165, 116, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-xs) 0;
  font-size: 0.9375rem;
}

.breakdown-label {
  color: var(--text-secondary);
}

.breakdown-value {
  font-weight: 600;
  color: var(--text-primary);
}

.breakdown-row.total-row {
  font-weight: 700;
  padding-top: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  border-top: 2px solid rgba(212, 165, 116, 0.2);
}

.breakdown-row.exchange-row {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  padding-top: var(--spacing-xs);
  border-top: 1px dashed rgba(212, 165, 116, 0.2);
}

/* ===== CHANGE CARD ===== */
.change-card {
  background: linear-gradient(135deg, #e6f7f0 0%, #d1f2e8 100%);
  border: 2px solid var(--success);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.change-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.change-header h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.change-amount {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--success);
  margin: var(--spacing-sm) 0;
  line-height: 1;
}

.change-note {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0;
}

/* ===== ERROR CARD ===== */
.error-card {
  background: rgba(239, 68, 68, 0.1);
  border: 2px solid var(--danger);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--danger);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

/* ===== SAVE BUTTON ===== */
.btn-save {
  width: 100%;
  min-height: 52px;
  padding: var(--spacing-md);
  background: var(--success);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-save:active {
  transform: scale(0.98);
  opacity: 0.9;
}

/* ===== HISTORY SECTION ===== */
.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  gap: var(--spacing-sm);
}

.btn-clear {
  min-height: 48px;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: 2px solid var(--danger);
  border-radius: var(--radius-md);
  color: var(--danger);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: all 0.2s ease;
  font-size: 0.9375rem;
  font-family: inherit;
}

.btn-clear:active {
  background: rgba(239, 68, 68, 0.1);
  transform: scale(0.95);
}

.summary-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-md) 0;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.summary-item {
  background: rgba(212, 165, 116, 0.05);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-align: center;
}

.summary-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.summary-value {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
}

/* ===== TRANSACTION LIST ===== */
.history-list {
  margin-top: var(--spacing-lg);
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  margin: 0;
}

.empty-state i {
  font-size: 48px;
  opacity: 0.5;
}

.transaction-item {
  background: rgba(212, 165, 116, 0.05);
  border: 1px solid rgba(212, 165, 116, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.transaction-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
}

.transaction-time {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
}

.transaction-change {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--success);
}

.transaction-details {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ===== SETTINGS SECTION ===== */
.settings-section {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid rgba(212, 165, 116, 0.2);
}

.settings-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.settings-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.settings-header i {
  color: var(--primary-color);
  font-size: 1.25rem;
}

.settings-header h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.settings-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

/* Install Button */
.btn-install {
  width: 100%;
  min-height: var(--touch-min);
  padding: var(--spacing-md);
  background: linear-gradient(135deg, #10b981, #059669);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.btn-install:active {
  transform: scale(0.98);
  box-shadow: var(--shadow-sm);
}

.btn-install i {
  font-size: 1.25rem;
}

/* Install Instructions */
.install-instructions {
  background: rgba(212, 165, 116, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.instruction-group {
  margin-bottom: var(--spacing-lg);
}

.instruction-group:last-child {
  margin-bottom: 0;
}

.instruction-group h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-sm) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.instruction-group h4 i {
  color: var(--primary-color);
}

.instruction-group ol {
  margin: 0;
  padding-left: 1.5rem;
}

.instruction-group li {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-xs);
}

.instruction-group li strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* App Info */
.app-info {
  background: rgba(212, 165, 116, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid rgba(212, 165, 116, 0.2);
}

.info-row:last-child {
  border-bottom: none;
}

.info-label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.info-value {
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-weight: 600;
}

/* ===== MODAL ===== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: white;
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 2px solid rgba(212, 165, 116, 0.2);
  gap: var(--spacing-md);
}

.modal-header h2 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  background: transparent;
  border: 2px solid rgba(0, 0, 0, 0.12);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:active {
  transform: rotate(90deg);
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  color: var(--danger);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-body h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--spacing-lg) 0 var(--spacing-sm) 0;
}

.modal-body h3:first-child {
  margin-top: 0;
}

.modal-body p {
  color: var(--text-primary);
  line-height: 1.6;
  margin: var(--spacing-sm) 0;
}

.help-list {
  padding-left: var(--spacing-lg);
  color: var(--text-primary);
  margin: var(--spacing-sm) 0;
}

.help-list li {
  margin-bottom: var(--spacing-xs);
  line-height: 1.6;
}

/* ===== TABLET MEDIA QUERY ===== */
@media (min-width: 768px) {
  :root {
    --touch-min: var(--touch-tablet);
  }

  .container {
    padding: 0 var(--spacing-lg) var(--spacing-xl);
  }

  .card {
    padding: var(--spacing-xl);
  }

  .app-header {
    padding: var(--spacing-lg) var(--spacing-xl);
  }

  .logo-section h1 {
    font-size: 1.5rem;
  }

  .preset-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .powered-by-badge img {
    height: 40px;
  }

  .powered-by-logo {
    width: 156px;
    height: 64px;
  }
}

/* ===== LANDSCAPE ORIENTATION ===== */
@media (orientation: landscape) and (max-height: 600px) {
  .modal-content {
    max-height: 95vh;
  }
}

/* ===== POWERED BY CARD (Info Tab) ===== */
.powered-by-card {
  display: block;
  background: linear-gradient(135deg, #fff8f0 0%, #ffefd5 100%);
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-xl);
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
}

.powered-by-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-hover);
}

.powered-by-card:active {
  transform: translateY(-2px);
}

.powered-by-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.powered-by-logo {
  /* Логото е 3:1 - в квадрат 64x64 надписът излизаше нечетим. */
  width: 132px;
  height: 56px;
  object-fit: contain;
  flex-shrink: 0;
  background: white;
  padding: 8px;
  border-radius: var(--radius-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.powered-by-text {
  flex: 1;
}

.powered-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 0 0 4px 0;
}

.powered-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 0 0 4px 0;
}

.powered-tagline {
  font-size: 0.875rem;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.4;
}

.powered-cta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-xs);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary-color);
  padding-top: var(--spacing-sm);
  border-top: 1px solid rgba(212, 165, 116, 0.2);
}

.powered-cta i {
  transition: transform 0.2s ease;
}

.powered-by-card:hover .powered-cta i {
  transform: translateX(4px);
}

/* ===== TAB NAVIGATION ===== */
.tab-content {
  display: none;
  animation: fadeIn 0.2s ease;
}

.tab-content.active {
  display: block;
}

/* ===== BOTTOM NAVIGATION ===== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  border-top: 2px solid rgba(212, 165, 116, 0.2);
  display: flex;
  justify-content: space-around;
  align-items: stretch;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.1);
  z-index: 1000;

  /* Safe area inset for notched devices */
  padding-bottom: env(safe-area-inset-bottom);
}

.nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: var(--spacing-sm) var(--spacing-xs);
  min-height: 64px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  position: relative;
}

.nav-btn i {
  font-size: 24px;
  transition: all 0.2s ease;
}

.nav-btn span {
  font-size: 0.75rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.nav-btn.active {
  color: var(--primary-color);
}

.nav-btn.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 3px;
  background: var(--primary-color);
  border-radius: 0 0 3px 3px;
}

.nav-btn:active {
  transform: scale(0.95);
  background: rgba(212, 165, 116, 0.05);
}

/* Remove history header from card in History tab */
#tabHistory .history-header {
  margin-bottom: var(--spacing-lg);
  padding: 0;
}

#tabHistory .section-title {
  margin-bottom: var(--spacing-md);
}

/* ===== PRINT STYLES ===== */
@media print {
  body {
    background: white;
    padding: 0;
  }

  .app-header,
  .btn-calculate,
  .btn-save,
  .btn-clear,
  .bottom-nav {
    display: none;
  }

  .container {
    padding: 0;
  }

  .card {
    box-shadow: none;
    page-break-inside: avoid;
  }
}